Double swivel bracket for outboard motors



Dec. 4, 1945. H. B. ToBlAs DOUBLE SWIVEL BRACKET FOR OUTBOARD MOTORS Filed Sept. 13, 1944 l; 'I 'In @noem Foz Hermann 75522605 u fw Patented Dec. 4, 1945 UNITED STATES PATENT OFFICE DOUBLE SWIVEL BRACKET FOR OUTBOARD MOTORS (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) 1 Claim.

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without paymentl to me of any royalty thereon.

This invention relates to small portable outboard motors that are attached to the stern transom of a boat for propulsion purposes.

The object ofthe present invention is to provide a'novel swivel bracket that will enable the operator to swing the propeller end of the outboard motor out of the water and then swing said outboard motor in a horizontal plane so as to bring the propeller end within the area of the boat when it becomes necessary to repair the propeller or t clear it of snagging objects.

The above and further objects and novel features of the invention will more fully appear from thefollowing detailed description and the accompanying drawing on which is shown only one of the preferred forms of thisinvention, it being understood that the drawing is for the purpose of illustration only and is not designed as a definition of the limits of the invention.

In the accompanying drawing like reference characters refer to like parts throughout the several views and where arrows appear the views are in the direction of said arrows.

Figure 1 is a side View of an outboard motor as it is attached to the stern transom of a boat.

Figure 2 is a perspectiveview of the swivel y bracket of a stern bracket.

Figure 3 is a sectional `View of the swivel bracket of the stern bracket taken on line 3-3 of the Figure 2.

Figure 4 is a detail of the locking pin.

In the existing art, small outboard motors consist of a power head I0 containing the engine mounted at the top of the driveshaft II, carried by the swivel bracket I2, secured through the tilting bolt 20 to a stern bracket 2| which is attached to the stern transom 30 and secured in place by the clamp screws 3|. The driveshaft I I extends downward into the water and connects at the bottom, by means of enclosed bevel gears 23, to a horizontally mounted propeller shaft 25.

The motor driveshaft II is supported within the sleeve I3 of the swivel bracket I2 to permit the entire motor, with the propeller immersed in water, to rotate on a vertical axis for steering purposes. The tilting bolt 20 permits the motor to swing in a vertical plane from an immersed vertical position shown at A to a horizontal position shown at B in Figure 1. This tilting arrangement is also necessary to allow for a free and automatic tilt of the motor when passing over a submerged obstruction or when it is necessary to beach the boat. The vertical position of the motor is regulated by a suitable thrust block bolted to quadrant 24 integral with the stern bracket 2|.

With the present motor supports it is possible to steer a boat by turning the entire motor around a vertical axis and it is also possible to ride over obstructions by allowing the motor to swing freely in a vertical plane but when it becomes necessary to remove any obstructions from the propeller, or to replace a sheared propeller pin, or to clear the water scoop, or to'make any other adjustments or repairs to the lower part of the motor assembly, it is necessary to remove the entire motor olf the stern transom, a diiilcult and dangerous task while in a small boat since it may result in capsizing the boat or dropping the motor overboard.

My present invention overcomes this diiculty by a novel swivel bracket construction comprising two members I2 and I4, joined around the swivel bolt I5, disposed at an approximate right angle to both the axis of crankshaft sleeve I3 and tilta retaining lplate, I1 which" is secured by the swivel bolt I5.

The ring flange I6 is secured against rotation by a lock knob 35 integral with a locking pin 36 that is actuated by a spring 38 which retains the lock pin 36 engaged in register hole 3l of the ring flange I6. The expansion spring 38 bears against a flange 40 integral with the pin 3B and is housed in a cup case 39 secured to the retaining plate II.

'When the motor is in the horizontal position, as shown at B in Figure l, a pull on the lock knob 35 disengages member I2 from member I4 of the swivel bracket and permits the rotation of member I2 of the swivel bracket in relation to member I4, allowing the entire motor assembly to swivel in a horizontal plane from the position shown at B to the position shown at C in Figure 1, thus bringing the propeller end of the motor within the boat. When the motor is swung into the position shown at C, it is possible for the operator to work on the lower or propeller end of the motor assembly in comfort and safety.

While there has herein been shown and described the invention in connection with a speciic embodiment of the same, it is not intended to be limited to the specific details of construcmotor and having a boss thereon positioned in said ring iiange, a retaining ring contacting said boss confining the ring iiange between the retaining ring and the sleeve and permitting rotation around said boss, a bolt and nut assembly clamping said retaining ring to said boss, and a depression in said ring flange arranged to receive a releasable spring plunger attached to and extending through the retaining ring thereby 10 locking the said members against rotation.

HERRMANN B. TOBIAS. 

